What happens in Vegas, stays in Vegas - unless you’re Prince Harry and being trailed by the paparazzi.

The 27-year-old Prince headed to Las Vegas for a holiday with his friends and decided to soak up the sun at Jennifer Lopez’s A-list pool party.

The young royal attempted to go incognito, wearing a white Panama hat and sunglasses, along with a pair of garish red and blue Hawaiian print shorts.

His ploy to look like an ordinary Brit abroad seems to have worked as most of the party guests didn’t even know that they were in the presence of royalty.

A source told The Sun: “Only a handful of people outside Harry’s group had any idea who he was.

“With his hat and shades on, Harry was almost unrecognisable. Most of his friends were wearing hats too so he blended in perfectly.

“They were dancing away and throwing a beach ball around, like any other young people having a good time.”

Showing off an impressively toned physique, Prince Harry was seen to be enjoying the company of a whole host of women at the Wet Republic pool, which has become a popular celeb hangout in recent years.

According to the onlooker, Harry even managed to stay anonymous when he went chasing after his beach ball, asking a fellow partygoer to throw it back to him.

The revellers at the party were reportedly too busy staring at a scantily-clad Jennifer Lopez, who held court with her boyfriend Casper Smart and her very large entourage.

Looking every inch a diva, the 43-year-old Dance Again singer wore tiny white crochet shorts and a matching crop top, with lots of gold accessories and large sunglasses.

Meanwhile, a topless Prince Harry was much more low key, having brought along just five male and five female pals to join him in the VIP bungalow.

The source added: “His security dressed all dressed down as well.

“Harry looked to be in his element, being able to enjoy himself without anyone outside of his group recognising him.”